论文部分内容阅读
研究了黑麦草不同翻压量对植烟土壤理化性状的影响。结果表明,翻压黑麦草的各处理均能够明显改善土壤的理化性状,提高烟叶品质,其中以翻压量为22 500 kg/hm2的综合效果最好。与对照相比,22 500 kg/hm2翻压量的处理在烟株移栽后30 d时土壤容重降低了0.064 g/cm3,土壤孔隙度和土壤含水率分别提高了2.48%和3.71%;在烟株整个生育期,土壤有机质、碱解氮、有效磷、速效钾含量分别提高了12.18%～30.84%,6.82%～21.46%,62.19%～119.20%,40.02%～85.44%,烟叶品质指标相对其他处理更优。翻压黑麦草的各处理均能够较好的调节土壤的pH值,改善土壤理化性状,表明翻压黑麦草后土壤生物过程活跃,有利于土壤有机物质的转化和烤烟正常生长所需的营养供应。
The effects of different levels of pressure on the physico-chemical properties of tobacco soil were studied. The results showed that the treatments of turning over ryegrass could obviously improve the physical and chemical properties of the soil and improve the quality of the tobacco leaf. Among them, the turning-pressure of 22 500 kg / hm2 was the best. Compared with the control, the soil bulk density was reduced by 0.064 g / cm3 and the soil porosity and soil water content increased by 2.48% and 3.71% respectively at 22 d after transplanting of 22 500 kg / The contents of soil organic matter, available nitrogen, available phosphorus and available potassium increased by 12.18% -30.84%, 6.82% -21.46%, 62.19% -119.20%, 40.02% -85.44%, respectively, during the whole growth period of tobacco plants. Other processing is better. The results showed that the soil biologic process was active after turning over the ryegrass, which was beneficial to the nutrient supply for the transformation of soil organic matter and the normal growth of flue-cured tobacco .